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Monty Taylor and Jim Blair on CI and Test Automation at OpenStack

Monty Taylor and James Blair talk about the build and test challenges they face at OpenStack, and how they managed to tackle them. Managing hundreds of VMs on public clouds, integrating up to 400 commits a day and running thousands of test jobs on them are some of the challenges described.

Sai Yang
on Dec 29, 2013
Building a Real-time, Personalized Recommendation System with Kiji

Jon Natkins explains in this article how to create a personalized recommendation system fed with large amounts of real-time data using Kiji, which leverages HBase, Avro, Map-Reduce and Scalding.

Jon Natkins
on Dec 26, 2013
Visualizing Java Garbage Collection

Garbage Collection, like Backgammon takes minutes to learn and a lifetime to master. In this article Master trainer/consultant Ben Evans summarizes his recent InfoQ presentation "Visualizing Garbage Collection" where he discusses Garbage Collection from the ground up.

Ben Evans
on Dec 25, 2013
Architecture and Agility: Married, Divorced, or Just Good Friends?

This article describes the relationship between architecture and process of software development and how architecture can responds to a set of needs, such as functional requirements, operational characteristics, and developer habitability. It also talks about the role of pragmatic architects when working with developers and stakeholders.

Kevlin Henney Frank Buschmann
on Dec 21, 2013
Cassandra CLI Internals Using JArchitect

Cassandra CLI is a useful tool for Cassandra administrators. It's a good example of how to implement a Cassandra client and CLI internals help us to develop custom Cassandra clients or even extend the CLI tool. In this article, author explores Cassandra CLI architecture model using JArchitect tool and CQLinq language to analyze its code base.

Dane Dennis
on Dec 19, 2013
Don’t jump the SQL ship just yet

The SQL language has been evolving steadily over the last two decades. At the same time, the verbosity caused by the JDBC API in Java client code and the lack of first class SQL support within the Java language have led to the introduction of ORMs such as Hibernate, which was later standardised into JPA and the Criteria API.If SQL and JPA are diverging, where will our data interaction patterns go?

Lukas Eder
on Dec 18, 2013
Meet Elaine: A Persona- Driven Approach to Exploring Architecturally Significant Requirements

Often, requirements elicited from stakeholders describe a system’s functionality but fail to address qualities such as performance, reliability, & availability. Documenting these requirements is often overlooked because there are implicit assumptions that the system will perform to expected levels. This article describes a process developed on the idea of persona sketches to address this problem.

Jane Cleland-Huang
on Dec 15, 2013
Key Takeaway Points and Lessons Learned from QCon San Francisco 2013

This article summarizes the key takeaways and highlights from QCon San Francisco 2013 as blogged and tweeted by attendees. Over the course of the next 4 months, InfoQ will be publishing most of the conference sessions online, including 19 video interviews that were recorded by the InfoQ editorial team. The publishing schedule can be found on the QCon San Francisco web site.

Abel Avram
on Dec 10, 2013
Exposing CQRS Through a RESTful API

Command Query Responsibility Segregation (CQRS) is an architectural pattern that segregates reads and writes of a system into two separate models. We propose and demonstrate an approach for building a RESTful API on top of CQRS systems. This approach joins HTTP semantics and resource-based style of REST APIs with distributed computing concerns such as eventual consistency and concurrency.

Ali Kheyrollahi
on Dec 09, 2013
Beyond Data Mining

In this article, author talks about the need for a change in the predictive modeling community’s focus and compares the four types of data mining: algorithm mining, landscape mining, decision mining, and discussion mining.

Tim Menzies
on Dec 06, 2013
Applying Lean Thinking to Software Development

Lean’s major concept is about reducing waste, meaning anything in your production cycle that is not adding value to the customer is considered waste and should therefore be removed from the process. Steven Peeters explains how you can apply Lean principles in an IT environment.

Steven Peeters
on Dec 05, 2013
To Execution profile or to Memory Profile? That is the question.

There are times when memory profiling will provide a clearer picture than execution profiling to find execution hot spots. In this article Kirk Pepperdine talks through some indicators for determining when to use which kind of profiler.

Kirk Pepperdine
on Dec 04, 2013

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